The study was conducted with five treatments (1, 2, 3, 4 and 5 ind./l) in order to identify the most suitable density for rearing orange clownfish larvae. Results showed that the fish reared at the densities of 1, 2 and 3 ind./l gave the highest specific growth rate (3.95
3.87 and 3.77 percent/day, respectively), followed by the density 0' 4 ind./l (3.27 percent/day), the lowest at the density of 5 ind./l (2.99 percent/day)
(P 0.05). Similarly, the fish larvae reared at the densities of 1, 2 and 3 ind./l gave the highest total length (12.41
12.09 and 11.76 mm), followed by the 4 ind./l (10.12 mm) and the lowest at 5 ind./l (9.32 mm)
(P 0.05). The fish larvae reared at the densities of 1, 2 and 3 ind./l obtained the highest survival rate (86.67
83.33 and 78.89) followed by the 4 ind./I (55.83 percent) and the lowest at5 ind./l (40.67 percent). In conclusion, the most appropriate density for rearing the orange fish larvae is 3 ind./l in order to optimize the growth, survival rate and economic efficiency.